Bosch Rexroth | 4WRZ25W6-220-7X6EG24N9ETK4D3V
4WRZ25W6-220-7X/6EG24N9ETK4/D3V
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The 4WRZ25W6-220-7X/6EG24N9ETK4/D3V valve is produced by Bosch Rexroth within the WRZ Proportional Directional Valves series. It modulates spool position to direct hydraulic flow in automated machinery. The onboard electronics require a 24 V DC supply, and the solenoid draws up to 1.5 A, so the driver card can be dimensioned accordingly. Maximum hysteresis is limited to 6%, which helps maintain repeatable flow rates during closed-loop control. The main stage passes a nominal 220 l/min at a 10 bar differential pressure, supporting high cylinder speeds in large circuits. A rated operating pressure of 350 bar allows the valve to run in standard high-pressure systems without derating. The housing follows the ISO 4401-08-07-0-94 mounting pattern, letting it bolt to common sub-plates with no adapter blocks. FKM seals are fitted to tolerate a broad range of hydraulic fluids, and an IP65 enclosure rating protects internal components from dust ingress and low-pressure water jets in typical plant environments.
An unobtrusive concealed manual override lets maintenance staff shift the spool mechanically when electrical power is unavailable. The coil is specified for temperatures up to 150 °C, so thermal sensors can be set below that limit to avoid insulation damage. Because the pilot supply and drain are both internal, external lines are unnecessary and manifold layouts stay compact. The pilot stage draws about 7 l/min during a 0–100 % command step, ensuring rapid actuation without excessive pump load. A built-in D3 pressure reducing valve stabilizes the pilot pressure and keeps the main spool movement consistent under varying system pressures. Cleanliness requirements are 20/18/15 for the main flow path and 18/16/13 for the pilot channels according to ISO 4406, guiding filter selection for reliable operation. Finally, the assembly weighs 18.2 kg, a factor that influences manifold support and handling equipment during installation.
Technical Specifications
Electronics Supply Voltage
24 V DC
Hysteresis (max)
6%
Main Valve Cleanliness
20/18/15 (ISO 4406(c))
Manual Override
Concealed
Max Coil Temperature
150 °C
Max Operating Pressure
350 bar
Mounting Interface
ISO 4401-08-07-0-94
Nominal Flow (10 Bar Δp)
220 l/min
Pilot Oil Flow (0-100% Step)
7 l/min
Pilot Supply/drain
Internal/Internal
Pilot Valve Cleanliness
18/16/13 (ISO 4406(c))
Pressure Reducing Valve
Included (D3)
Protection Type
IP65
Seals
FKM
Solenoid Max Current
1.5 A
Weight
18.2 kg
1620 Old Apex Road
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